Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (6): 20240090.doi: 10.7503/cjcu20240090

• Organic Chemistry • Previous Articles     Next Articles

Methodologies for the Precise Modification of Guest Molecules by Proteins

DAI Zhen1,2, LIU Yu1, LIU Tao2,3,4()   

  1. 1.College of Chemistry,State Key Laboratory of Element of Organic Chemistry,Nankai University,Tianjin 300071,China
    2.State Key Laboratory of Natural and Biomimetic Drugs,School of Pharmaceutical Sciences
    3.Chemical Biology Center
    4.Department of Molecular and Cellular Pharmacology,School of Pharmaceutical Sciences,Peking University,Beijing 100191,China
  • Received:2024-02-23 Online:2024-06-10 Published:2024-03-19
  • Contact: LIU Tao E-mail:taoliupku@pku.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22325701);the National Key Research and Development Program of China(2022YFA0912400);the Beijing Natural Science Foundation, China(JQ20034)

Abstract:

Precise modification of guest molecules on proteins is a crucial technological foundation for supramole- cular modulation of protein activity. This is especially true for aromatic functional group guests containing positive charges, which can be efficiently bound to cucurbituril. However, precise modification of these molecules on proteins using non-canonical amino acid site specific modification technology can be challenging. The linkers of bioorthogonal reactions are often large, which can affect the recognition of the host and guest molecules. To address this issue, the target proteins were modified by adding iodine- or alkynyl-functional amino acids using the non-canonical amino acid site specific modification technology. The pyridine molecules with a positive charge were efficiently bound to cucurbituril molecules using the palladium-catalyzed Suzuki and Sonogashira coupling reaction. Subsequently, a non-natural amino acid with an alkynyl functional group was successfully incorporated into the target proteins using a series of reaction conditions. Furthermore, a Sonogashira coupling reaction was utilized to attach a positively charged pyridine molecule to the protein surface. These accomplishments establish a crucial technological basis for the chemical regulation of proteins through host-guest interactions.

Key words: Precise modification, Non-canonical amino acid, Host and guest, Protein

CLC Number: 

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